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jarptica [38.1K]
3 years ago
14

How many elements are there

Chemistry
1 answer:
yawa3891 [41]3 years ago
4 0
There are 118 known elements
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What is the connection of ascorbic acid when one tablet is dissolved in 200cm cubed of water ?
BartSMP [9]

Answer:

              Option-D: 2.3 × 10⁻³ mol/dm³

Explanation:

Calculate moles of ascorbic acid,

Moles = Mass / M.Mass

Moles = 0.080 g / 176 g/mol

Moles = 0.00045 mole

Also,

Molarity = Moles / Vol. in dm³

Molarity = 0.00045 mol / 0.20 dm³

Molarity = 0.00227 mol.dm⁻¹ or 2.3 × 10⁻³ mol/dm³

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2 years ago
Which statement describes how heat is transferred by radiation?
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Its Convention Current Waves i think

4 0
3 years ago
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True or False? <br><br> A day is about 12 hours long
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Answer:

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2 years ago
Which statement describes both homogeneous mixtures and heterogeneous mixtures?
stiks02 [169]

Answer:

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5 0
3 years ago
PLS help
viktelen [127]

Answer:

d . Sc2O5

Explanation:

Hello,

In this case, when forming oxides from a metal and oxygen, for us to find out each element's subscript, we must exchange them as shown below, considering +5 for scandium:

Sc^{+5}_2O^{-2}_5

For that reason, the answer is d . Sc2O5

Best regards.

3 0
3 years ago
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